AudioCodes Media Pack MP-124, User Manual

Page: 333 / 584

Version 6.6 333 MP-11x & MP-124
User's Manual 31. Software Upgrade
Ring Type=0
Freq
[Hz]= 20
First Ring On Time [10msec]= 200
First Ring Off Time [10msec]= 400
#GR-506-CORE Ringing Pattern 1
[Ringing Pattern #1]
Ring Type=1
Freq
[Hz]= 20
First Ring On Time [10msec]= 200
First Ring Off Time [10msec]= 400
#GR-506-CORE Ringing Pattern 2
[Ringing Pattern #2]
Ring Type=2
Freq
[Hz]= 20
First Ring On Time [10msec]= 80
First Ring Off Time [10msec]= 40
Second Ring On Time [10msec]= 80
Second Ring Off Time [10msec]= 400
31.1.2 Prerecorded Tones File
The CPT file mechanism has several limitations such as a limited number of predefined
tones and a limited number of frequency integrations in one tone. To overcome these
limitations and provide tone generation capability that is more flexible, the Prerecorded
Tones (PRT) file can be used. If a specific prerecorded tone exists in the PRT file, it takes
precedence over the same tone that exists in the CPT file and is played instead of it.
Note: The PRT are used only for generation of tones. Detection of tones is
performed according to the CPT file.
The PRT is a .dat file containing a set of prerecorded tones that can be played by the
device. Up to 40 tones (totaling approximately 10 minutes) can be stored in a single PRT
file on the device's flash memory. The prerecorded tones are prepared offline using
standard recording utilities (such as CoolEdit
TM ) and combined into a single file, using
AudioCodes DConvert utility (refer to DConvert Utility User's Guide for more information).
The raw data files must be recorded with the following characteristics:

Coders: G.711 A-law or G.711 µ-law

Rate: 8 kHz

Resolution: 8-bit

Channels: mono
Once created, the PRT file can then be loaded to the device using AudioCodes' AcBootP
utility or the Web interface (see 'Loading Auxiliary Files' on page
327 ).
The prerecorded tones are played repeatedly. This allows you to record only part of the
tone and then play the tone for the full duration. For example, if a tone has a cadence of 2
seconds on and 4 seconds off, the recorded file should contain only these 6 seconds. The
PRT module repeatedly plays this cadence for the configured duration. Similarly, a
continuous tone can be played by repeating only part of it.